35mm cartridge on the left, 127 roll film on the right. Photo by Murilee Martin

35mm film, which is still available all over the place, is 7 millimeters narrower than 127 film, and there are several methods of getting it to work in a 127 camera. I opted to pull some 35mm film out of a cartridge (in a dark bag) and tape it to a used roll of 127 backing paper. After a couple of trips to Denver-area wrecking yards with my pair of Vest Pocket Kodaks and some Fomapan 100 35mm film, I got some interesting results (if you don't mind sprocket holes).